Added rules for Pike, stellarium and dvdauthor.
Fixed comment.
We now have a rather full featured transcode.
Added rules for avifile.
Added avifile dependency for transcode.
ffmpeg now installs libpostproc which transcode wants.
Added libfame dependency to transcode.
Added libmpeg3 dependency to transcode.
Added lame to transcode dependencies.
Added mpeg2dec to transcode dependencies.
